Nanopower μP Supervisory Circuits withManual Reset and Watchdog TimerMAX6854/MAX6855/MAX6856/MAX6858/MAX6860–MAX6869MAX6854/MAX6855/MAX6856 Pin DescriptionPINMAX6854/MAX6856MAX6855NAMEFUNCTION1—RESETActive-Low Open-Drain or Push-Pull Reset Output.RESETtransitions from high tolow when VCCdrops below the selected reset threshold orMRis pulled low.RESETremains low for the reset timeout period after VCCexceeds the devicereset threshold andMRdeasserts. Push-pullRESEToutputs are referenced toVCC. Open-drainRESEToutputs require an external pullup resistor.Ground. Connect all GND inputs to the same potential.Active-Low Manual Reset Input. DriveMRlow to initiate a reset. The reset outputremains asserted whileMRis held low and for the reset timeout period afterMRtransitions high. LeaveMRunconnected or connect to VCCif unused.MRisinternally pulled up to VCCthrough 10kΩ.Supply Voltage. Input for VCCreset monitor. For noisy systems, bypass VCCwitha 0.1μF capacitor to GND.Active-High Push-Pull Reset Output. RESET transitions from low to high whenVCCdrops below the selected reset threshold orMRis pulled low. RESETremains high for the reset timeout period after VCCexceeds the device resetthreshold andMRdeasserts. RESET is referenced to VCC

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